Road numberSwitzerland
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54. Road number
A road number is a number or combination of letters and numbers used to identify a particular road or route within a road network. Road numbers help drivers follow routes, distinguish between different types of roads and navigate between cities, regions and countries.
Road numbers are commonly displayed on route markers and direction signs. Their format, colour and prefixes vary between countries and may indicate whether a route is a motorway, national road, regional road or international route.
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What is a road number?
A road number is an identifier assigned to a particular road or route, usually consisting of numbers alone or a combination of letters and numbers.
Where can you find road numbers?
Road numbers are commonly displayed on route markers, direction signs and advance direction signs to help drivers follow the correct route.
Do road-number systems differ between countries?
Yes. Countries use different prefixes, colours and numbering systems to distinguish motorways, national roads, regional roads and international routes.

Traffic rules
Switzerland